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Local pdf.js pagination. Crop box shows on enter; floating bar picks Current/All pages; stitch into one PNG…
What you can do
- Open PDF to Long Image and retry with a small known-good sample.
- Confirm you are not hitting this limit: Stitched width/height over 32000px is blocked—reduce pages or crop more.
- Check the FAQ below—encryption, size limits, and format mismatches are the usual causes.
- Still stuck? Try a private window, or read the full guide /#article/pdf2longimg.
FAQ
What limitations should I know?
Stitched width/height over 32000px is blocked—reduce pages or crop more.
When might it fail?
Output is always PNG; pages stitch top to bottom.
What else should I watch for?
Fully local; for sensitive PDFs prefer offline tools.